0
TECHNICAL PAPERS

The Unsteady Development of a Turbulent Wake Through a Downstream Low-Pressure Turbine Blade Passage

[+] Author and Article Information
R. D. Stieger, H. P. Hodson

Engineering Department, Whittle Laboratory, Cambridge University, Madingley Road, Cambridge, UK

J. Turbomach 127(2), 388-394 (May 05, 2005) (7 pages) doi:10.1115/1.1811094 History: Received October 01, 2003; Revised March 01, 2004; Online May 05, 2005
Copyright © 2005 by ASME
Your Session has timed out. Please sign back in to continue.

References

Hodson, HP, 1998, “Bladerow Interactions In Low Pressure Turbines,” Blade Row Interference Effects Axial Turbomachinery Stages, Von Karman Institute, Brussels, Belgium, in VKI Lecture Series No. 1998-02, Feb 9.
Howell, R. J., Hodson, H. P., Schulte, V., Schiffer, H-P., Haselbach, F., and Harvey, N. W., 2001, “Boundary Layer Development on the BR710 and BR715 LP Turbines-The Implementation of High Lift and Ultra High Lift Concepts,” ASME Paper No. 2001-GT-0441.
Cobley, K., Coleman, N., Siden, G., and Arndt, N., 1997, “Design of New Three Stage Low Pressure Turbine for BMW Rolls-Royce BR715 Engine,” ASME Paper No. 97-GT-419.
Meyer,  R. X., 1958, “The Effects of Wakes on the Transient Pressure and Velocity Distributions in Turbomachines,” ASME J. Basic Eng., 80, pp. 1544–1552.
Hodson,  H. P., 1985, “A Blade-to-Blade Prediction of Wake-Generated Unsteady Flow,” ASME J. Eng. Gas Turbines Power, 107.
Giles, M. B., 1987, “Calculation of Unsteady Wake/Rotor Interactions,” AIAA 25th Aerospace Sciences Meeting, Reno, AIAA Paper 87-0006.
Addison,  J. S., and Hodson,  H. P., 1992, “Modelling of Unsteady Transitional Boundary Layers,” ASME J. Turbomach., 114(3), pp. 580–589.
Doorly, D. L., and Oldfield, 1985, “Simulation of the Effects of Shock Wave Passing on a Turbine Rotor Blade,” ASME Paper No. 85-GT-112.
La Graff,  J. E., Ashworth,  D. A., and Schultz,  D. L., 1989, “Measurements and Modelling of the Gas Turbine Blade Transition Process as Disturbed by Wakes,” ASME J. Turbomach., 111, pp. 315–322.
Stieger, R. D., and Hodson, H. P., 2003, “The Transition Mechanism of Highly Loaded LP Turbine Blades,” ASME Paper No. GT2003-38304.
Stieger, R. D., Hollis, D., and Hodson, H. P., 2003, “Unsteady Surface Pressures Due to Wake Induced Transition in a Laminar Separation Bubble on a LP Turbine Cascade,” ASME Paper No. GT2003-38303.
Schulte, V., 1995, “Unsteady Separated Boundary Layers in Axial-flow Turbomachinery,” Ph.D. dissertation, Cambridge Univ., Cambridge, England.
Halstead, D. E., 1997, “Flowfield unsteadiness and turbulence in multistage low pressure turbines,” Conf. Boundary layer transition in turbomachines, Syracuse Univ., Minnowbrook, Sep 7–10.
George, W. K., 1975, “Limitations to Measuring Accuracy Inherent in the Laser-Doppler Signal,” Proc. LDA Symp., Copenhagen.

Figures

Grahic Jump Location
Bar passing cascade with T106 profile.
Grahic Jump Location
Grid for 2D LDA measurements of the convection of a bar wake through the T106 LP turbine cascade
Grahic Jump Location
Perturbation velocity vectors from 2D LDA measurements at six equispaced time instants through the wake-passing cycle. T106, Re=1.6×105,sb/sc=1,ϕ=0.83,fr=0.68
Grahic Jump Location
Nondimensional turbulent kinetic energy (TKE) from 2D LDA measurements at six equispaced time instants through the wake-passing cycle. Perturbation velocity vector superimposed (c) and (d). T106, Re=1.6×105,sb/sc=1,ϕ=0.83,fr=0.68
Grahic Jump Location
Nondimensional production of TKE (PTKE*) from 2D LDA measurements at six equispaced time instants through the wake-passing cycle. Perturbation velocity vector superimposed (c) and (d). T106, Re=1.6×105,sb/sc=1,ϕ=0.83,fr=0.68
Grahic Jump Location
Anisotropy (α) from 2D LDA measurements at six equispaced time instants through the wake-passing cycle. T106, Re=1.6×105,sb/sc=1,ϕ=0.83,fr=0.68.
Grahic Jump Location
Vectors of principal stress components 〈uψ′2〉 and 〈vψ′2〉 at (a) t/τ0=0.00 and (c) t/τ0=0.333. Contour of 〈PTKE*〉=0.01 and 〈TKE*〉=0.001 (dotted line) highlight the position of the wake and TKE production. The exploded box shows principal stress components and principal strain vectors in region of peak TKE production.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In